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91 lines
2.9 KiB
91 lines
2.9 KiB
#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |
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#define BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |
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// MS compatible compilers support #pragma once |
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#if defined(_MSC_VER) && (_MSC_VER >= 1020) |
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# pragma once |
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#endif |
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// |
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// boost/detail/spinlock_pool.hpp |
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// |
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// Copyright (c) 2008 Peter Dimov |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// spinlock_pool<0> is reserved for atomic<>, when/if it arrives |
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// spinlock_pool<1> is reserved for shared_ptr reference counts |
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// spinlock_pool<2> is reserved for shared_ptr atomic access |
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// |
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#include <boost/config.hpp> |
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#include <boost/smart_ptr/detail/spinlock.hpp> |
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#include <cstddef> |
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namespace boost |
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{ |
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namespace detail |
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{ |
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template< int I > class spinlock_pool |
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{ |
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private: |
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static spinlock pool_[ 41 ]; |
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public: |
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static spinlock & spinlock_for( void const * pv ) |
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{ |
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#if defined(__VMS) && __INITIAL_POINTER_SIZE == 64 |
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std::size_t i = reinterpret_cast< unsigned long long >( pv ) % 41; |
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#else |
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std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41; |
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#endif |
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return pool_[ i ]; |
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} |
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class scoped_lock |
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{ |
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private: |
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spinlock & sp_; |
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scoped_lock( scoped_lock const & ); |
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scoped_lock & operator=( scoped_lock const & ); |
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public: |
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explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) ) |
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{ |
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sp_.lock(); |
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} |
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~scoped_lock() |
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{ |
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sp_.unlock(); |
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} |
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}; |
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}; |
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template< int I > spinlock spinlock_pool< I >::pool_[ 41 ] = |
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{ |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
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BOOST_DETAIL_SPINLOCK_INIT |
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}; |
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} // namespace detail |
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} // namespace boost |
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED
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